Methods and apparatus to reduce noise in motor assemblies

ABSTRACT

Example methods and apparatus can be used to reduce noise in motor assemblies, such as those used in architectural coverings. An example apparatus includes a first driver configured to be coupled to and rotated by an output shaft of a motor, a second driver, and a plurality of vibration-absorbers disposed between the first driver and the second driver. The second driver is configured to be coupled to a rotating member to transfer rotational motion from the first driver to the rotating member via the vibration-absorbers.

RELATED APPLICATIONS

This patent claims the benefit under 35 U.S.C. § 119(e) to U.S.Provisional Application No. 62/455,366, titled “METHODS AND APPARATUS TOREDUCE NOISE IN ARCHITECTURAL COVERINGS,” filed Feb. 6, 2017, and toU.S. Provisional Application No. 62/568,697, titled “METHODS ANDAPPARATUS TO REDUCE NOISE IN ARCHITECTURAL COVERINGS,” filed Oct. 5,2017, both of which are incorporated herein by this reference in theirentireties.

FIELD OF THE DISCLOSURE

This disclosure relates generally to motors and, more particularly, tomethods and apparatus to reduce noise in motor assemblies.

BACKGROUND

Motor assemblies are used in many applications to provide power to adownstream or driven member. Motor assemblies include a motor with anoutput shaft that is operatively coupled to the driven member. Theconnection between the motor output shaft and the driven member oftengenerates significant noise due to vibrations between the components.

For instance, architectural coverings such as roller blinds, verticalwindow coverings, horizontal window coverings, and spring-loaded windowcoverings provide shading and privacy. Such architectural coveringsoften include a motorized assembly coupled with a covering fabric orother shading material. In particular, a motor rotates a roller tube orlift rod to raise or lower the cover or shading material. Thesemotorized assemblies often include complex coupling devices with manyparts or components that connect an output shaft of the motor to theroller tube or lift rod. As a result, these motorized assemblies tend tobe loud and noisy when operating due to vibration of the parts andcomponents, which is a nuisance to the user and/or others in the area.

BRIEF DESCRIPTION OF THE DRAWINGS

Implementations of motor assemblies constructed in accordance withprinciples of inventions disclosed herein will be described withreference to the following drawings, which are not to be considered aslimiting, but rather, illustrations of examples of manners ofimplementing principles of the disclosure. For example, whileimplementations of motor assemblies within architectural coverings aredescribed, many other implementations will occur to persons of ordinaryskill in the art upon reading this disclosure.

FIG. 1 is a perspective view of an example of an architectural coveringemploying an example of a drive coupling constructed in accordance withone or more principles of this disclosure.

FIG. 2 is an exploded view of the example of the drive coupling of FIG.1.

FIG. 3 is a perspective view of the example of the drive coupling ofFIG. 2 in a partially assembled state.

FIG. 4 is a perspective view of the example of the drive coupling ofFIG. 2 in an assembled state.

FIG. 5 is another perspective view of the example of the drive couplingof FIG. 2 in an assembled state.

FIG. 6A is a side view of an example of an elastic ring employed in theexample of the drive coupling of FIG. 1.

FIG. 6B is a top view of the example of the elastic ring of FIG. 6A.

FIG. 7 is an end view of the example of the drive coupling of FIG. 1implemented with an example of a roller tube.

FIG. 8 is an end view of the example of the drive coupling of FIG. 1implemented with another example of a roller tube.

FIG. 9 illustrates an example of a tube adapter that may be implementedwith the example of the drive coupling of FIG. 1.

FIG. 10 illustrates another example of a tube adapter that may beimplemented with the example of the drive coupling of FIG. 1.

FIG. 11 illustrates another example of a tube adapter that may beimplemented with the example of the drive coupling of FIG. 1.

FIG. 12 is a perspective view of an example of a driver, which may beimplemented in the example of the drive coupling of FIG. 1, and whichmay be constructed using a die casting process.

FIG. 13 is a cross-sectional view of the example of the driver of FIG.12 taken along line A-A of FIG. 12.

FIG. 14 illustrates the example of the driver of FIG. 13 showing anexample of a pin arrangement that may be used to form openings in theexample of the driver during the die casting process.

FIG. 15 illustrates the example of the driver of FIG. 13 showing a motoroutput shaft inserted into an opening formed in the example of thedriver using the pin arrangement of FIG. 14.

FIG. 16 is a perspective view of an example of an architectural coveringemploying another example of a drive coupling constructed in accordancewith one or more principles of this disclosure.

FIG. 17 is an exploded view of the example of the drive coupling of FIG.16.

FIG. 18 is a perspective view of the example of the drive coupling ofFIG. 16 in a partially assembled state.

FIG. 19 is a perspective view of the example of the drive coupling ofFIG. 16 in an assembled state.

FIG. 20 is another perspective view of the example of the drive couplingof FIG. 16 in an assembled state.

FIG. 21A is a side view of the example of the drive coupling of FIG. 16in which a second driver of the drive coupling is tilted about an axisand is unaligned with respect to a first driver of the drive coupling.

FIG. 21B is a side view of the example of the drive coupling of FIG. 21Ain which the second driver is tilted about another axis and is unalignedwith respect to the first driver.

FIG. 22A is a side view of the example of the drive coupling of FIG. 16in which a second driver of the drive coupling is misaligned with afirst driver of the drive coupling.

FIG. 22B is a plan view of a hub of the drive coupling of FIG. 22Ashowing movement of posts of the first and second drivers.

FIG. 23A is an exploded view of another example of a drive coupling thatmay be used with an architectural covering.

FIG. 23B is a side view of the example of the drive coupling of FIG. 23Ain an assembled state.

FIG. 24 illustrates an example of an architectural covering including anexample of a headrail having an example of a valance withsound-dampening material constructed in accordance with one orprinciples of this disclosure.

FIGS. 25A and 25B illustrate an example of a clip used to couple anexample of a layer of sound-dampening material to a back side of theexample of the valance of FIG. 24.

FIGS. 26A and 26B illustrate another example in which an example of alayer of sound-dampening material is coupled to a back side of anexample of a valance and constructed in accordance with one or moreprinciples of this disclosure.

FIG. 27 illustrates an example of a valance having a pocket into whichsound-dampening material may be disposed and constructed in accordancewith one or more principles of this disclosure.

DETAILED DESCRIPTION

Disclosed herein are example drive couplings used to reduce potentialnoise generated by a connection between a driving member, such as anoutput shaft of a motor of a motor assembly, and a downstream or drivenmember. While some of the example drive couplings and other relatedaspects disclosed herein are described in connection with motorassemblies in architectural coverings, any of the examples disclosedherein can likewise be implemented with motor assemblies in other typesof devices or systems, such as material handling systems, robotics, beltor chain drive systems, and/or any other type of motor assembly having aconnection between an output shaft (a driving member) and a downstreamdriven member. The example drive couplings and/or other aspectsdisclosed herein can be used with these motor assemblies to similarlyreduce vibration (and, thus, potential noise) between a motor and/ordriving member and a downstream driven member. Thus, the example drivecouplings and/or others aspects are not limited to architecturalcoverings.

Some architectural coverings include a motor assembly to extend orretract a covering (e.g., by rotating a roller tube) to cover or uncoveran architectural opening and/or structure. For example, in a verticallyextending covering, a motor operates in one direction to raise thecovering and in the opposite direction to the lower the covering. Themotor is coupled to a rotating member, such as a roller tube or a liftrod. When rotated, the covering or a cord operating the covering may bewound or unwound by the rotating member to raise or lower thecorresponding covering. Known architectural coverings, includingmotorized coverings, non-motorized coverings, and/or dual operationcoverings, typically generate a significant amount of audible noise,which can become a nuisance to those in the surrounding area of thearchitectural covering.

Disclosed herein are example methods and apparatus that reduce potentialnoise generated by architectural coverings. Aspects of this disclosuremay be implemented to reduce potential noise from any type of motorized,non-motorized, and/or dual operation architectural covering. Thus,aspects of this disclosure result in quieter, more desirablearchitectural coverings. While humans are capable of hearing frequenciesof between 20 hertz (Hz)-20 kilo-Hz (kHz) (which are considered audiblefrequencies), certain frequencies have a greater perceived loudness tohumans. For instance, frequencies of between 1 kHz and 5 kHz aregenerally perceived as louder than other audible frequencies, even ifthe amplitude or strength of the noise is in this range is less than theamplitude or strength of the noise in a frequency outside this range.Example aspects disclosed herein result in reduced noise (e.g., from 37decibels (db) to 32 db) in this range of frequencies (as well as otherfrequencies outside the range) and, thus, create a more desirableenvironment for a user. Aspects of this disclosure may also reduce thenumber of parts and components in an architectural covering, whichdecreases manufacturing costs, decreases assembly time, and increasesthe useful life of the architectural covering (e.g., by decreasing thenumber of parts and components that would otherwise be subject to wearand, thus, failure over time).

In accordance with one aspect of the disclosure, an architecturalcovering includes a drive coupling that transfers rotational motion froman output shaft of a motor to a rotating member (e.g., a roller tube, alift rod, etc.), arranged and configured to raise or lower a covering.Some such drive couplings include one or more vibration-absorbers (whichmay be referred to isolators), such as sound-dampening elastic rings,which reduce potential noise generated by vibration between the parts ofthe architectural covering. Some such drive couplings also employsignificantly fewer parts or components than known architecturalcoverings and, thus, further reduce vibrations between the parts andcomponents. By using few parts or components, the example drivecouplings are also less expensive to manufacture and result in reducedassembly time. The example drive couplings disclosed herein may be usedwith any type of architectural covering such as conventional draperies,shutters, horizontal and vertical blinds, and various other kinds ofshades, including roller and cellular shades, etc.

In accordance with some aspects of this disclosure, the drive couplingincludes a driver configured to be coupled to and rotated by an outputshaft of a motor. Such a driver, which may be referred to as an inputdriver, interfaces with a driven member, which may be referred to as anoutput driver, that is coupled to a rotating member (e.g., a rollertube, a lift rod, etc.) for extending or retracting an architecturalcovering. As such, the input driver rotates the driven member to rotatethe corresponding rotating member to extend or retract the covering.

In accordance with one aspect of the disclosure, the driven member isimplemented as an adapter, such as a tube adapter, that has one or morefeatures to engage matching feature(s) on a rotating member, such as aroller tube. For example, the motor and drive coupling may be disposedwithin the roller tube, and the tube adapter may engage an insidesurface of the roller tube. The tube adapter rotates with the motoroutput shaft. Thus, the tube adapter transfers rotational motion of themotor output shaft to the rotating member to extend or retract thecorresponding covering.

As mentioned above, in one aspect of the disclosure, the drive couplingincludes an input driver to be coupled to the output shaft of the motor.The input driver interfaces with the tube adapter (e.g., the drivenmember) to rotate the tube adapter when the motor output shaft isrotated. In other words, the input driver operates to rotate the tubeadapter and, thus, rotate the roller tube. In one aspect of thedisclosure, one or more vibration-absorbers are disposed between avibration generator, such as the motor and/or the input driver (which iscoupled to the output shaft of the motor), and a driven member, such asthe tube adapter. The vibration-absorber(s) may be constructed of alower durometer material, such as a material that absorbs vibrationsbetween the parts of the drive coupling and, thus, reduces potentialnoise that would otherwise be caused thereby. In some examples, this isaccomplished due to the shape of the vibration-absorber(s), which mayhave relatively thin wall sections (e.g., about 0.032 inches (0.8128millimeters (mm)) disposed in compression during use, which allows forisolating vibration while minimizing backlash (even with lower durometermaterial (e.g., 50 Shore A)). In other words, because the durometer islow, vibration damping is optimized while the amount of material thatallows compression is minimized. Known spider couplings interpose arigid, high durometer spider (55 Shore D) between a driving jaw couplingand a driven jaw coupling to allow for misalignment (e.g., slop or play)between the two jaw couplings. However, unlike these known spidercouplings, the example drive couplings disclosed herein interpose one ormore vibration-absorber(s), such as a vibration-absorber of a lowerdurometer material (e.g., 50 Shore A), between a vibration generator,such as the motor and/or the input driver, and the one or moredownstream/driven member(s), such as the second driver, the tubeadapter, the roller tube, the headrail, another drive shaft, etc., toreduce vibrations between the part(s). In other words, thevibration-absorber(s) isolate(s) the vibration generator from thedownstream/driven member(s) that would otherwise amplify and/or increasethe vibrations and noise. In one aspect of the disclosure, thevibration-absorber(s) (of relatively softer material) create arelatively tight interface between the vibration generator and thedownstream/driven member(s) that reduces vibrations and, thus, reducesnoise that would otherwise be caused between these parts and/or otherdownstream/driven member(s). Further, in some instances, thevibration-absorbers provide intimate contact between the driving member,such as the driver, and the driven member, such as the rotating member,to minimize backlash, which may otherwise be caused by a covering thatdisposes the weight alternately from one side to the other side of therotating member.

In accordance with one aspect of the disclosure, the one or morevibration-absorber(s) are coupled to a portion of the driver. Further,the driven member is operatively engaged with the one or morevibration-absorber(s). As used herein, the terms “operatively engaged,”“operatively engages,” “operatively engaging,” or variations thereofmean a first part is in direct and/or indirect contact with a secondpart (e.g., indirect contact via one or more intermediary parts). Assuch, when the driver is rotated, rotational motion is transferred tothe driven member (and, thus, the rotating member) via thevibration-absorber(s).

In accordance with one aspect of the disclosure, the driver has a set ofmounts to which a driven member, such as tube adapter, may be mounted.In one aspect of the disclosure, the mounts are posts that extendparallel to and spaced apart from a rotational axis of the driver. Asthe driver rotates, the posts rotate about the rotational axis. Inaccordance with one aspect of the disclosure, the tube adapter includesa central portion with one or more arms (e.g., having features to engagethe rotating member) extending outwardly from the central portion. Thecentral portion is disposed between the posts of the driver and the armsextend outwardly, beyond the posts to engage the roller tube. Thus, theoutput shaft of the motor rotates the driver, which rotates the tubeadapter and, thus, rotates the roller tube.

In accordance with one aspect of the disclosure, to reduce vibrationbetween the driver and the tube adapter, the drive coupling includes oneor more vibrations-absorbers interposed between the driver and the tubeadapter. In one aspect of the disclosure, a set of vibration-absorbers,hereinafter “elastic rings” for the sake of convenience without intentto limit, are coupled to portions of the driver and interposed betweenthe driver and the tube adapter. For example, the drive coupling mayinclude elastic rings (e.g., non-viscoelastic rings), such as grommets,mounted on the posts. In particular, one elastic ring is disposed oneach of the posts. The elastic rings are engaged with and may beconstructed to carry the tube adapter. Thus, the elastic rings isolatethe tube adapter from the driver. In accordance with one aspect of thedisclosure, the tube adapter includes a web or rib between each pair ofadjacent arms. The elastic rings may be disposed between the adjacentarms with the web or rib disposed in the groove of the respectiveelastic ring. The interface between the webs and the elastic ring and/orbetween the elastic ring and the posts result in less noise generated bythe parts of the architectural covering. In accordance with one aspectof the disclosure, the elastic rings are constructed of nitrile rubber(otherwise known as Buna-N).

In accordance with another aspect of this disclosure, the drive couplingincludes a driver, implemented as a first driver (e.g., the inputdriver) that is coupled to the output shaft of the motor, which isconnected to a driven member, implemented as a similarly shaped seconddriver (e.g., the driven member, the output driver, etc.) that iscoupled to a rotating member, such as a lift rod, a drive shaft, etc.The first driver may be connected to the second driver via one or moreposts and vibration-absorber(s) (e.g., as described above) using anintermediate generally clover-shaped disc or hub to transfer torque,while isolating vibration between the driver and the driven member. Inother words, when the motor output shaft is rotated, the first driverinterfaces with the hub via the one or more vibration-absorber(s), whichinterfaces with the second driver via one or more vibration-absorber(s)to rotate the rotating member, such as a driven shaft or lift rod. Inone aspect of this disclosure, one or more spools with lift cords arecoupled to the lift rod. The lift rod may be rotated to wind or unwindthe lift cord(s) to extend or retract the corresponding cover in amanner known in the art or to be developed.

Similar to the drive coupling disclosed above, one or morevibration-absorbers may be disposed between the first driver and thesecond driver (e.g., the driven member) to reduce potential noise thatcould otherwise result from operation of the parts connecting the motorand any downstream/driven parts. The vibration-absorber(s) isolate thevibration source, such as the motor and/or the first driver, from thedownstream/driven member(s), such as the second driver, the lift rod,the headrail, etc. that could otherwise amplify and/or increase thevibrations and noise. Similar to the vibration-absorbers disclosedabove, the vibration-absorber(s) may be constructed of relatively softmaterial that creates a tight interface between the vibration generatorand the downstream/driven member(s), which reduces movement betweenthese parts. Further, the vibration-absorbers may compress or deform toabsorb movement or vibration between the parts. Thus, thevibration-absorbers reduce potential vibrations (and, thus, reducenoise) that would otherwise be caused between these parts and/or otherdownstream/driven member(s) using a looser connection and more rigidparts.

In accordance with one aspect of the disclosure, the first driver has afirst set of mounts and the second driver has a second set of mounts. Inone aspect of the disclosure, the mounts are posts. For example, thefirst driver may have a first set of posts that extend outward towardthe second driver, and the second driver may have a second set of poststhat extend outward toward the first driver. In one aspect of thedisclosure, the drive coupling includes a hub disposed between the firstset of posts and the second set of posts. The output shaft of the motorrotates the first driver, which rotates the hub, which rotates thesecond driver and, thus, rotates the rotating member.

In accordance with one aspect of the disclosure, to reduce vibrationbetween the first driver, the hub and the second driver, the drivecoupling includes one or more vibration-absorbers interposed between thefirst driver and the hub, and between the hub and the second driver.Similar to the vibration-absorbers disclosed above, thevibration-absorbers may be implemented as elastic rings, such asgrommets. In one aspect of the disclosure, one elastic ring is disposedon each of the first set of posts and the second set of posts. Thus, theelastic rings separate the first driver from the hub and separate thesecond driver from the hub. In accordance with one aspect of thedisclosure, the hub includes a plurality of notches and the elasticrings are disposed in the notches such that an outer edge of the hubextends into grooves in the outer edges of the elastic rings. Theinterface between the posts, the elastic rings and the hub results inless noise generated by the parts of the architectural covering. Inaccordance with one aspect of the disclosure, the elastic rings areconstructed of nitrile rubber (otherwise known as Buna-N).

In some instances, the output shaft of the motor and the rotating membermay be misaligned. For example, due to tolerances in manufacturing ofthe mounts that hold the motor and/or the rotating member, the axis ofthe motor output shaft and the axis of the rotating member may not beperfectly aligned. In known coupling assemblies, this misalignmentcauses increased wear and, thus, degradation of the parts of thecoupling assembly. In accordance with one aspect of the disclosure, thesecond driver may be tiltable with respect to the rotational axis of thefirst driver, which enables the drive coupling to transfer rotationalmotion even when the motor output shaft and the axis of the rotatingmember are not aligned. The vibration-absorbers compress or deform,which allows the posts of the first driver and/or the second driver tobe tilted with respect to the hub and, thus, to the other of the firstdriver and/or the second driver. As such, the rotational axis of thesecond driver (and, thus, the rotating member) can be misaligned withthe rotational axis of the first driver and the output shaft of themotor while still being rotatably coupled to the first driver. Thisadvantageously enables the drive coupling to transfer rotational motioneven when the output shaft of the motor and the rotating member (e.g.,the lift rod) are not axially aligned and without causing addition wearon the parts of the drive coupling.

Also disclosed herein are examples of valances having sound-dampeningmaterial for attenuating potential noise generated by architecturalcoverings. As used herein, the term “valance” means structure that is tobe disposed in front of and/or over an architectural covering to hideand/or otherwise block the view of at least a portion of thearchitectural covering. Some valances are decorative and have aestheticfeatures. For example, a valance may be disposed outside a window frameto hide an architectural covering located in the window frame. Thevalance may be coupled to the architectural covering and/or to thearchitectural structure (e.g., the window frame). In accordance with oneaspect of the disclosure, a layer or strip of sound-dampening materialis coupled to a back side of the valance facing the architecturalcovering. In accordance with one aspect of the disclosure, thesound-dampening material is butyl rubber. The sound-dampening materialattenuates or dampens sound generated by the architectural covering. Asa result, example valances greatly reduce potential noise generated byarchitectural coverings (e.g., motorized coverings).

In accordance with one aspect of the disclosure, a valance is part of aheadrail that is used to mount the architectural covering to anarchitectural structure (e.g., a window frame). For example, a headrailmay include a top mounting plate and a valance extending downward fromthe top mounting plate. The top mounting plate may be coupled (e.g., viaone or more screws) to the architectural structure to mount the headrail(and, thus, the architectural covering) to the architectural structure.The valance extends downwardly from the top mounting plate to coverand/or otherwise obstruct the view of the architectural covering. Inaccordance with other aspects of the disclosure, the valance may beseparate from the top mounting plate and separately coupled to theoutside of the architectural covering and/or to the architecturalstructure.

Also disclosed herein are examples of techniques to couple the layer ofsound-dampening material to the back side of the valance. In accordancewith one aspect of the disclosure, a clip is used to couple the layer ofsound-dampening material to the back side of the valance. For example,the sound-dampening material may be coupled to a back side of the clip(e.g., via an adhesive). In one aspect of the disclosure, the back sideof the valance includes a first connector (e.g., a female connector) andthe back side of the clip has a second connector (e.g., a maleconnector) to mate with the first connector. The clip may be mounted tothe back side of the valance (via the connectors), thereby holding thesound-dampening material between the clip and the valance and, thus,coupling the sound-dampening material to the back side of the valance.In some instances, using the clip prevents contact between the coveringand the strip of sound-dampening material (which may otherwise leavemarks or coloring on the covering material). Additionally oralternatively, the layer of sound-dampening material may include anadhesive side, which may be contacted against the back side of thevalance.

Also disclosed herein are example methods of manufacturing a valance andthe example valances resulting from such methods. In accordance with oneaspect of the disclosure, the clip and the layer of sound-dampeningmaterial are constructed by extruding the clip and the sound-dampeningmaterial simultaneously. As such, the layer of sound-dampening materialis coupled (e.g., bonded) to the back side of the clip. In accordancewith one aspect of the disclosure, the valance is also manufactured viaan extrusion process. Then, the clip may be coupled to the back side ofthe valance to couple the sound-dampening material to the back side ofthe valance. In accordance with another aspect of the disclosure, alayer of sound-dampening material may be co-extruded onto a back side ofa valance. In some instances, the valance includes a pocket or recess,and the layer of sound-dampening material is extruded into the recess.In accordance with other aspects of the disclosure, other types ofmanufacturing processes may be implemented.

In some aspects of this disclosure, a drive coupling as disclosed hereinmay be implemented in an architectural covering also having a valancewith sound-dampening material as disclosed herein. In some instances,the combination of these features produces improved noise reductioncompared to each feature used by itself. In accordance with some aspectsof this disclosure, the combination of features may also be implementedwith one or more other noise-reduction features. In accordance withother aspects of this disclosure, the example drive couplings and theexample valances with sound-dampening material may be used separatelyfrom one another and/or in combination with other noise-reductionfeatures.

All apparatuses and methods discussed in this document and illustratedin the accompanying drawings are examples of apparatuses and/or methodsimplemented in accordance with one or more principles of thisdisclosure, which principles may be applied singly or in combination.These examples are not the only way to implement these principles butare merely examples. Other examples of manners of implementing thedisclosed principles will occur to a person of ordinary skill in the artupon reading this disclosure. It will be appreciated that the drawingsillustrate examples of embodiments of the disclosure incorporating oneor more principles or features, and thus reference to or description ofa particular structure or element in the figures is to be understood asreference to or description of an example of an embodiment, but notnecessarily the only manner of embodying the disclosure.

Turning now to the figures, FIG. 1 illustrates an example of anarchitectural covering 100 having a covering 102. Architectural covering100 may be used to cover an architectural structure, such as a wall,and/or an architectural opening, such as a window, a door, a sky light,an archway, etc. In accordance with one aspect of this disclosure, anexample drive coupling may be coupled to the output shaft of the motorto transfer rotational motion to the roller tube or other rotatingmember that moves a covering in one direction or the other. Exampledrive couplings disclosed herein greatly reduce potential noise thatwould otherwise be generated by the connection between the motor and therotating member.

For example, in the illustrated example of FIG. 1, architecturalcovering 100 includes a motor 104 and a rotating member, implemented asa roller tube 106 (shown in dashed lines). Covering 102 is wound aroundor unwound from roller tube 106 to extend or retract covering 102. Inother words, motor 104 operates to rotate roller tube 106 in onedirection to retract covering 102 (e.g., raise covering 102 or otherwiseuncover an architectural structure and/or opening) and rotate rollertube 106 in the opposite direction to extend the corresponding covering102 (e.g., lower covering 102 or otherwise cover the architecturalstructure and/or opening). Motor 104 may be powered by any combinationof internal and/or external power line connections, power from a walloutlet, battery(ies), fuel cells, solar panels, wind powered generators,and/or any other power source. Motor 104 has a motor output shaft 108.

To transfer rotational motion from motor output shaft 108 to roller tube106, example architectural covering 100 includes an example drivecoupling 110. Drive coupling 110 is coupled to and rotates with motoroutput shaft 108. Additionally, drive coupling 110 is coupled to rollertube 106. As such, when motor 104 rotates motor output shaft 108, drivecoupling 110 transfers the rotational motion to roller tube 106.

In the illustrated example of FIG. 1, roller tube 106 is disposedoutside and concentric with motor 104. In other words, motor 104 isdisposed within roller tube 106 and operates to rotate roller tube 106from within roller tube 106. In other aspects of this disclosure, motor104 and roller tube 106 may be arranged in other configurations. Forexample, motor 104 may be disposed outside roller tube 106 and alignedwith roller tube 106 (e.g., end-to-end). Further, while examplearchitectural covering 100 is illustrated with example covering 102, itis understood that example architectural covering 100 may be implementedwith any type of covering, such as conventional draperies, shutters,horizontal and vertical blinds, and various other kinds of shades,including roller and cellular shades, etc.

In accordance with one aspect of this disclosure, the drive couplingincludes one or more vibration-absorbers that are used to reducevibration between the parts of the architectural covering. For example,the drive coupling may include a driver that connects to the outputshaft of the motor and a tube adapter that connects to the roller tube.The driver rotates the tube adapter to rotate the roller tube. Inaccordance with one aspect of this disclosure, vibration-absorbers areutilized between the driver and the tube adapter to reduce vibrationand, thus, to reduce potential noise in an architectural covering. Forexample, the driver may include a set of mounting structures, such asposts, extending outwardly from a plate in a direction that is parallelto and offset from a rotational axis of the driver. The tube adapter mayinclude a central portion, disposed between the posts, and a set of armsextending outwardly from the central portion beyond the posts to engagethe roller tube. As the driver rotates, the posts rotate the tubeadapter and, thus, rotate the roller. In accordance with one aspect ofthe disclosure, the vibration-absorbers are located between the posts ofthe driver and the tube adapter. In accordance with one aspect of thisdisclosure, the vibration-absorbers may be embodied as elastic rings.For example, an elastic ring may be disposed on each post, and the armsof the tube adapter may be engaged by the elastic rings. Thus, the tubeadapter is indirectly coupled to the driver by the elastic rings. In oneaspect of the disclosure, the elastic rings are implemented as grommets.The interface between the driver, the vibration-absorbers, and the tubeadapter results in decreased vibration, which greatly reduces and/oreliminates noise that would otherwise be generated by a traditionalconnection.

For example, FIG. 2 is an exploded view of example drive coupling 110.In the illustrated example, drive coupling 110 includes a driver 200, aset of elastic rings 202, a tube adapter 204 (e.g., a cog) and aretainer 206. Driver 200 includes a mounting shaft 208 that isconfigured to be coupled to motor output shaft 108 of motor 104 (FIG.1). In one aspect of this disclosure, mounting shaft 208 includes anopening to receive motor output shaft 108, as disclosed in furtherdetail in conjunction with FIG. 5. When coupled to motor output shaft108, motor 104 rotates driver 200 about a rotational axis 210 (e.g., acentral or longitudinal axis of driver 200). In one aspect of thisdisclosure, rotational axis 210 is substantially aligned with therotational axis of motor output shaft 108 of motor 104. In theillustrated example of FIG. 2, driver 200 includes a plate 212 coupledto mounting shaft 208. Plate 212 is oriented perpendicular to rotationalaxis 210. Driver 200 includes a set of posts 214 that are coupled to andextend from a face 216 of plate 212. In the illustrated example, driver200 includes four posts 214. However, in other aspects of thisdisclosure, driver 200 may include more (e.g., five posts, six posts,etc.) or fewer posts (e.g., three posts, two posts, one post). Posts 214are parallel to and offset from rotational axis 210. As such, whendriver 200 is rotated, posts 214 rotate around rotational axis 210. Inthe illustrated example of FIG. 2, posts 214 are spaced equidistant fromrotational axis 210 and are arranged in a square pattern aroundrotational axis 210. However, in other aspects of this disclosure, posts214 may be arranged in other configurations and/or may be spaced closerto or further from rotational axis 210 and/or one another.

In the illustrated example of FIG. 2, plate 212 includes raised surfaces218 (one of which is referenced in FIG. 2) where posts 214 extend fromface 216 of plate 212. When drive coupling 110 is assembled (asillustrated in FIGS. 4 and 5), raised surfaces 218 separate elasticrings 202 from face 216 of plate 212. In other aspects, no raisedsurfaces may be implemented.

In one aspect of this disclosure, driver 200 is constructed as asubstantially unitary part or component. For example, driver 200 may bemolded as a single part or component and/or machined from a single pieceof material (e.g., zinc). In another aspect of this disclosure, driver200 may be constructed of multiple parts or components that are coupledtogether (e.g., posts 214 may be welded to plate 212, plate 212 may bewelded to mounting shaft 208, etc.).

In one aspect of the disclosure, a tube adapter may be included in thedrive coupling to transfer rotational motion from the driver to theroller tube. The tube adapter may include one or more features that matewith or engage one or more features on the roller tube. In accordancewith one aspect of this disclosure, the tube adapter includes a centralportion and a plurality of arms extending from the central portion. Thearms may include the features to engage the roller tube (e.g., to engagean inner surface of the roller tube). In accordance with one aspect ofthis disclosure, the central portion of the tube adapter is disposedbetween the posts of the driver, and the arms extend outwardly beyondthe posts to engage the roller tube. In one aspect of this disclosure,the tube adapter may be interchangeable with one or more other tubeadapters having different features and/or sizes for interfacing withother roller tubes.

For example, referring back to FIG. 2, to transfer rotational motionfrom driver 200 to roller tube 106 (FIG. 1), drive coupling 110 includestube adapter 204. Tube adapter 204 engages roller tube 106. Inparticular, tube adapter 204 includes arms 220 that extend outwardlyfrom a central portion 222. In the illustrated example, tube adapter 204includes four arms 220. However, in other aspects of this disclosure,tube adapter 204 may include more or fewer arms 220. An end 224 of eacharm 220 includes a first feature, implemented as a slot 226 (e.g., afemale feature) (one of which is referenced in FIG. 2), that mates witha second feature (e.g., a male feature) on an inner surface of rollertube 106, as disclosed in further detail in conjunction with FIG. 7. Inthe illustrated example of FIG. 2, arms 220 form a cross-shape. Curvedor arc-shaped notches 228 are formed between adjacent arms 220. In theillustrated example, tube adapter 204 has four notches 228, one betweeneach adjacent pair of arms 220. In one aspect of the disclosure, thenumber of posts 214 (and, thus, the number of elastic rings 202)corresponds to the number of notches 228. In one aspect of thedisclosure, using four posts 214 with four elastic rings 202 results theoptimal reduction in noise generated by architectural covering 100. Inother aspects of this disclosure, with more or fewer arms 220, tubeadapter 204 may have more or fewer notches 228 and, thus, more or fewerposts 214 may be used.

In accordance with one aspect of this disclosure, one or more parts forabsorbing vibration are included in the drive coupling to dampenvibration and, thus, reduce potential noise. The vibration-absorber(s)may be constructed of a lower durometer material (e.g., Shore Amaterial). The vibration-absorber(s) may be interposed in one or morelocations between the relatively harder part(s) of the drive coupling.For example, the vibration-absorbers may be disposed between the driverand a driven member, such as the tube adapter. In one aspect of thisdisclosure, the vibration-absorbers are implemented as elastic rings.For example, referring to FIG. 1, drive coupling 110 includes elasticrings 202. In the illustrated example, elastic rings 202 are implementedas grommets. However, in other aspects of the disclosure, other types ofelastic rings may be implemented. Each elastic ring 202 includes anopening 230 to receive a respective one of posts 214. In the illustratedexample, each elastic ring 202 includes a groove 232 (one of which isreferenced in FIG. 2) formed in an outer edge 234 of the respectiveelastic ring 202. To mate with grooves 232, each notch 228 on tubeadapter 204 includes a rib or web 236 (one of which is referenced inFIG. 2). Each web 236 is located between adjacent arms 220. Asillustrated in FIG. 3, when drive coupling 110 is being assembled,elastic rings 202 are inserted into notches 228. In this arrangement,webs 236 (FIG. 2) fit into grooves 232 of elastic rings 202.

In the illustrated example, elastic rings 202 may be used to carry tubeadapter 204 when elastic rings 202 are placed on posts 214. In otherwords, the elastic rings 202 are interposed between driver 200 and tubeadapter 204 to reduce (e.g., minimize) or eliminate contact betweendriver 200 and tube adapter 204. In the illustrated example, tubeadapter 204 is operatively engaged with elastic rings 202. Elastic rings202 absorb vibration that may otherwise cause acoustic waves (e.g.,sound) between driver 200 and tube adapter 204 (and, thus, roller tube106 (FIG. 1)). Further, in one aspect of the disclosure, elastic rings202 may be coupled to posts 214 and tube adapter 204 (e.g., via webs 236and grooves 232) with minimal clearance, which reduces backlash. Forinstance, the thin wall sections (on either side of grooves 232) ofelastic rings 202 may be disposed in compression during use, whichallows for isolating vibration while minimizing backlash. Backlash isthe clearance between the forward motion and backward motion betweendriver 200 and tube adapter 204 that results when switching direction ofrotation (e.g., between extending and retracting covering 102 (FIG. 1)).Backlash may be an effect generated by a covering that disposes theweight alternately from one side to the other side of a rotating member.Elastic rings 202 keep driver 200 and tube adapter 204 in relativelyintimate contact without excess clearance to minimize backlash.

In one aspect of the disclosure, elastic rings 202 are constructed of amaterial that is resilient or elastic enough (e.g., non-viscoelastic) toreturn to its original shape after being compressed, but soft enough tobe compressed when torqued between driver 200 and tube adapter 204 (and,thus, to absorb vibrations therebetween). For example, elastic rings 202may be constructed of materials having a durometer of about 40 Shore Aand above, at increments of 1, and/or a durometer of about 65 Shore Aand below, at increments of 1. In accordance with one aspect of thedisclosure, elastic rings 202 are constructed of 50 Shore A nitrilerubber (known as Buna-N). In other aspects of the disclosure, elasticrings 202 may be constructed of other materials, such as a polyurethane.Driver 200 and tube adapter 204 may be constructed of a higher durometermaterials (e.g., to withstand higher torques). For example, driver 200may be constructed of zine, nylon, and/or a polycarbonate alloy, andtube adapter 204 may be constructed of acetal, which has optimallubricity and toughness. Alternatively, in other aspects of thedisclosure, driver 200 and/or tube adapter 204 may be constructed ofother materials.

In accordance with one aspect of this disclosure, a retainer may beprovided to hold elastic rings (and, thus, tube adapter) on the driver.For example, referring back to FIG. 2, drive coupling 110 includesretainer 206, which may be coupled to posts 214 of driver 200 afterelastic rings 202 and tube adapter 204 are coupled to driver 200. Inparticular, retainer 206 includes four openings 238 to receive posts214. For example, FIG. 4 shows an assembled view of drive coupling 110where elastic rings 202 are disposed on posts 214 and retainer 206 iscoupled to posts 214 to retain elastic rings 202 on posts 214. Anexample process of assembling drive coupling 110 may include insertingposts 214 into elastic rings 202 (i.e., placing elastic rings 202 onposts 214), and then pressing tube adapter 204 between posts 214 suchthat elastic rings 202 are inserted into notches 228 of tube adapter204. Another example assembly process may include inserting elasticrings 202 into notches 228 of tube adapter 204 first (as depicted inFIG. 3), and then inserting posts 214 into elastic rings 202. Afterelastic rings 202 are on posts 214 and tube adapter 204 is disposedbetween posts 214 and operatively engaged with elastic rings 202,retainer 206 may be placed onto posts 214 to retain tube adapter 204 andelastic rings 202 on posts 214.

Referring back to FIG. 2, each post 214 includes a first section 240(one of which is referenced in FIG. 2) have a circular cross-section anda second section 242 having a cross-shaped cross-section (one of whichis referenced in FIG. 2). When drive coupling 110 is assembled, eachelastic ring 202 is disposed on first section 240 of the correspondingpost 214, and retainer 206 is disposed on second sections 242 of posts214. Second sections 242 are shaped to provide an interference fit withretainer 206. In other words, retainer 206 may be coupled to posts 214by pressing retainer 206 onto posts 214. In other aspects of thedisclosure, first section 240 and/or second section 242 may be shapeddifferently. For example, the second section 242 may be have asquare-shaped cross-section. Additionally or alternatively, in otheraspects of the disclosure, other chemical and/or mechanical fastenersmay be used to couple retainer 206 and posts 214. For example, insteadof using retainer 206, the ends of posts 214 may include nubs (e.g.,similar to nubs 1720 disclosed in connection with first driver 1700 ofFIG. 17) to retain elastic rings 202 on posts 214.

FIG. 5 shows another perspective view of assembled drive coupling 110.In the illustrated example of FIG. 5, mounting shaft 208 of driver 200includes an opening 500 (sometimes referred to as an output shaftopening) to receive motor output shaft 108 of motor 104 (FIG. 1). In oneaspect of the disclosure, driver 200 is coupled to motor output shaft108 via an interference fit. In another aspect of the disclosure, driver200 is coupled to motor output shaft 108 via a set screw (a screwextending through mounting shaft 208 into motor output shaft 108).Additionally or alternatively, in another aspect of the disclosure,other chemical and/or mechanical fasteners may be used to couple driver200 and motor output shaft 108.

In accordance with one aspect of this disclosure, the elastic rings areimplemented as grommets. The elastic rings have an outer diameter and aninner diameter. In accordance with one aspect of this disclosure, eachelastic ring includes a groove around an edge or circumferential surfaceof the elastic ring.

For example, FIG. 6A is a side view of one of elastic rings 202 and FIG.6B is a top or plan view of elastic ring 202. As illustrated in FIGS. 6Aand 6B, elastic ring 202 has a height H (or thickness), an outerdiameter D1, and an inner diameter D2 (which is the diameter of opening230). In one aspect of the disclosure, height H is about 0.1875 inches(in) (4.7625 millimeters (mm)) (e.g., ±0.003 in (0.076 mm)) and outerdiameter D1 is about 0.3437 in (8.7313 mm) (e.g., ±0.003 in (0.076 mm)).In other aspects of the disclosure, height H and/or outer diameter D1may be larger or smaller. In one aspect of the disclosure, the clearanceor difference between inner diameter D2 and a diameter of the respectivepost 214 (FIG. 2) is about 0.005 in (0.127 mm) (e.g., ±0.003 in (0.076mm)). For example, inner diameter D2 may be about 0.125 in (3.175 mm)and the diameter of post 214 may be about 0.119 in (3.023 mm)±0.003 in(0.076 mm). This clearance results in the most noise reduction whilestill enabling easy assembly of elastic rings 202 on posts 214. In otheraspects of this disclosure, inner diameter D2 of elastic ring 202 and/orthe diameter of the respective post 214 may be larger or smaller. Forexample, depending on the durometer of elastic rings 202, the toleranceor clearance between posts 214 and elastic rings 202 may be larger orsmaller. In some aspects of this disclosure, reducing a contact areabetween posts 214 and the inner surfaces of the respective elastic rings202 reduces potential noise generated by vibrations between thecomponents. Thus, the dimensions and clearances can be changed based ondifference in size, the materials used, and/or a design configurationthat that minimizes surface area contact. In other aspects of thedisclosure, the dimensions of elastic rings 202 and/or posts 214 may beselected such that the contact area is not minimized (e.g., to coupleelastic rings 202 tightly to posts 214 such that a relatively largecontact area is produced).

As illustrated in FIG. 6A, groove 232 has a width W and a depth R. Inone aspect of the disclosure, depth R may be about 0.047 in (1.1938 mm)(e.g., ±0.003 in (0.076 mm)). In other aspects of the disclosure, depthR may be larger or smaller. In one aspect of this disclosure, theclearance or difference between width W of groove 232 and a width of web236 (FIG. 2) is about 0.005 in (or 0.127 mm) (e.g., ±0.003 in (0.076mm)). For example, width W may be about 0.0625 in (1.5875 mm) and thewidth of web 236 may be about 0.087 in (2.21 mm) (e.g., ±0.003 in (0.076mm)). This clearance results in minimal noise caused from vibrationbetween the parts and components. In other aspects of this disclosure,the dimensions of width W and/or the width of web 236 may be larger orsmaller.

FIG. 7 shows an end view of drive coupling 110 and roller tube 106. Inthe illustrated example, roller tube 106 includes an inner surface 700having extensions 702 that extend radially inward from inner surface700. Extensions 702 are spaced apart to match the arrangement of slots226 on arms 220. As such, when drive coupling 110 is inserted intoroller tube 106, extensions 702 are inserted into slots 226 in arms 220.Thus, when tube adapter 204 is rotated, roller tube 106 is rotated.

While in the illustrated example of FIG. 7 roller tube 106 includes fourextensions 702 (one for each of slots 226), in other aspects of thedisclosure, roller tube 106 may include more or fewer extensions.Likewise, tube adapter 204 may include more or fewer slots 226. Forexample, only one slot may be provided on one arm 220, and only oneextension may be provided on inner surface 700 of roller tube 106. Inother aspects of the disclosure, slots 226 and extensions 702 arereversed. For example, arms 220 may include extensions that extend fromarms 220, and inner surface of roller tube 106 may include slots toreceive the extensions on arms 220.

In one aspect of the disclosure, tube adapter 204 may be interchangedwith another tube adapter having a different design corresponding to adifferent roller tube. As such, drive coupling 110 can be used to drivea variety of different roller tubes. For example, FIG. 8 shows an endview of a second roller tube 800 and a second tube adapter 802 carriedby driver 200. In the illustrated example, second roller tube 800includes an inner surface 804 with two sections of teeth 806 extendinginward from inner surface 804. Tube adapter 802 includes four arms 808,similar to tube adapter 204 of FIG. 2. Two of arms 808 include teeth 810to mate with teeth 806 on second roller tube 800. In another aspect ofthis disclosure, second roller tube 800 may include more or fewersections of teeth and second tube adapter 802 may include more or fewermatching sections of teeth. In another aspect of this disclosure, othershaped features may be used instead of teeth and/or the features may bespaced differently. Further, in one aspect of this disclosure, secondtube adapter 802 may have longer or shorter arms than tube adapter 204of FIG. 2. As such, drive coupling 110 can be used to drive roller tubeshaving larger or smaller diameters than roller tube 106. Thus, drivecoupling 110 can be easily adapted to interact with a variety ofdifferent roller tubes.

In accordance with one aspect of this disclosure, one or more of thearms of the tube adapter may include one or more fingers extendingradially outward from the arm(s) and engage the inner surface of theroller tube. The finger(s) increase the contact area between the tubeadapter and the roller tube to further help reduce potential vibrations(and, thus, noise) between the drive coupling and the roller tube. Thefinger(s) may be flexible and may help maintain the tube adaptercentered within the roller tube. The finger(s) may also help take up anyradial tolerance or excess space between the ends of the arms of thetube adapter and the inner surface of the roller tube.

FIG. 9 illustrates another tube adapter 900 that may be implemented withdrive coupling 110. Tube adapter 900 is similar to tube adapter 204(FIGS. 2 and 7) and includes a central portion 902, arms 904 that extendoutwardly from central portion 902, curved notches 906 (to receivevibration-absorbers) formed between adjacent arms 904, and matingfeatures, implemented in this example as slots 908, formed in ends 910of arms 904 to mate with corresponding features on an inner surface of arotating member, such as a roller tube (e.g., roller tube 106 of FIGS. 1and 7). Additionally, tube adapter 900 includes fingers 912 (two ofwhich are referenced in FIG. 9) that extend outward from ends 910 ofarms 904 (in a direction along a central axis of tube adapter 900) andradially outward (e.g., upward) from ends 910 of arms 904, as can beseen in the callout in FIG. 9. Fingers 912 are flexible and biasedoutwardly to maintain contact with an inner surface of the roller tubeto remove any clearance between the tube adapter and the roller tube(which may be a potential source of noise generation). For example, iftube adapter 900 is inserted into a roller tube, such as roller tube 106of FIG. 7, fingers 912 are biased against inner surface 700 of rollertube 106. Fingers 912 increase the contact point with the roller tube106 and take up any radial tolerance or excess clearance between tubeadapter 900 and roller tube 106. Therefore, if there is a gap betweenends 910 of arms 904 and inner surface 700 of the roller tube 106 (e.g.,due to lower manufacturing tolerances), fingers 912 help to keep tubeadapter 900 (and, thus, drive coupling 110) centered within the rollertube 106 and prevent movement of roller tube 106 and/or tube adapter 900in the radial directions (which may otherwise cause vibration and, thus,noise). In some aspects of this disclosure, fingers 912 are not subjectto any torsional forces when tube adapter 900 rotates roller tube 106.In other words, fingers 912 are not intended to engage extensions 702 onroller tube 106. Instead, fingers 912 help maintain tube adapter 900centered, so that sufficient contact can be made between the innersurfaces of slots 908 in arms 904 and extensions 702 on roller tube 106to transfer rotational motion from tube adapter 900 to roller tube 106when tube adapter 900 is rotated. In the illustrated example, fingers912 have a relatively small, negative rake angle to prevent fingers 912from catching or snagging on inner surface 700 of roller tube 106 (e.g.,during insertion and/or removal of the corresponding drive coupling fromroller tube 106). In the illustrated example of FIG. 9, two fingers 912are implemented on each arm 904 and are disposed on either side of thecorresponding slot 908 on each arm 904. In other examples, more or fewerfingers 912 may be implemented and/or fingers 912 may be arranged inother configurations.

FIG. 10 illustrates another tube adapter 1000 that may be implementedwith drive coupling 110. Similar to tube adapter 204 (FIG. 2), tubeadapter 1000 includes a central portion 1002, arms 1004 that extendoutwardly from central portion 1002, and curved notches 1006 (to receivevibration-absorbers) formed between adjacent arms 1004. In theillustrated example of FIG. 10, arms 1004 are relatively straight(compared to arms 220 of tube adapter 204) and extend outwardly furtherthan arms 220 of tube adapter 204. In the illustrated example, ends 1008of arms 1004 are slightly enlarged (e.g., tapered outward) andconfigured to be inserted into corresponding slots or grooves formed onan inner surface of a roller tube. Additionally, in the illustratedexample of FIG. 10, tube adapter 1000 includes fingers 1010 that extendoutwardly from ends 1008 of arms 1004 (in a direction along a centralaxis of tube adapter 1000) and radially outward (e.g., upward) from ends1008 of arms 1004. Similar to fingers 912 of tube adapter 900 (FIG. 9),fingers 1010 increase the contact surface of tube adapter 1000 with aroller tube and help center tube adapter 1000 within the roller tube,which reduces movement and, thus, potential vibrations between tubeadapter 1000 and the corresponding roller tube. In other examples, moreor fewer fingers 1010 may be implemented and/or fingers 1010 may bedisposed in other locations.

FIG. 11 illustrates another tube adapter 1100 that may be implementedwith drive coupling 110. Similar to tube adapter 204 (FIG. 2), tubeadapter 1100 includes a central portion 1102, arms 1104 that extendoutwardly from central portion 1102, and curved notches 1106 (to receivevibration-absorbers) formed between adjacent arms 1104. In theillustrated example of FIG. 11, arms 1104 are shaped similar to arms 220of tube adapter 204. In the illustrated example, ends 1108 of arms 1104are relatively wide and configured to be inserted into correspondingslots or grooves formed on an inner surface of a roller tube.Additionally, in the illustrated example of FIG. 11, tube adapter 1100includes fingers 1110 that extend outwardly from ends 1108 of arms 1104(in a direction along a central axis of tube adapter 1100) and radiallyoutward (e.g., upward) from ends 1108 of arms 1104. Similar to fingers912 of tube adapter 900 (FIG. 9), fingers 1110 increase the contactsurface of tube adapter 1100 with a roller tube and help center tubeadapter 1100 within the roller tube, which reduces movement and, thus,potential vibrations between tube adapter 1100 and the correspondingroller tube. In other examples, more or fewer fingers 1110 may beimplemented and/or fingers 1110 may be disposed in other locations.

While in the illustrated example of FIGS. 1-11, tube adapters 204, 900,1000, 1100 are configured to be disposed between posts 214 and elasticrings 202 with arms extending outwardly, beyond elastic rings 202 toengage roller tube 106, in other examples, a tube adapter may bedisposed outside posts 214 and elastic rings 202. For example, a tubeadapter in the form of a cylindrical sleeve may be disposed aroundelastic rings 202. An inner surface of the cylindrical sleeve mayinclude grooves to receive respective ones of elastic rings 202. Anouter surface of the cylindrical sleeve may have one or more features(e.g., similar to slots 226 on arms 220 of tube adapter 204) to matewith corresponding features on inner surface 700 of roller tube 106.Rotational motion may be similarly transferred to the cylindrical sleeveby rotating driver 200, which interfaces with the cylindrical sleeve viathe elastic rings 202.

As mentioned above, driver 200 (FIG. 2) includes opening 500 (FIG. 5) toreceive motor output shaft 108 (FIG. 1). Opening 500 should beconfigured to contact motor output shaft 108 along a sufficient lengthor in multiple contact locations/points to keep driver 200 centered withrespect to motor output shaft 108. One example manufacturing processthat may be used to construct driver 200 is die casting. Die casting isa relatively fast and inexpensive process for making metallic parts. Diecasting includes forcing molten metal into a mold cavity formed by twoor more dies. After the metal hardens, the dies are separated and theresulting part is ejected. To die cast driver 200, for example, opening500 may be formed by a pin that is disposed in the mold cavity. When,the pin is removed after the metal hardens, the resulting void formsopening 500 through mounting shaft 208. The pin is tapered at a draftangle so that the pin can be removed after the mold is opened. However,using a single tapered pin may result in a tapered or angled openingthat may not desirable because only minimal contact would be achievedbetween motor output shaft 108 and the inside of opening 500. In otherwords, only the smallest diameter portion of the tapered opening mayform the contact location with the motor output shaft. With such a smallcontact location, driver 200 may become misaligned on the motor outputshaft. Further, driver 200 may wobble or vibrate on the motor outputshaft, which generates noise.

FIG. 12 illustrates an example driver 1200 that may be manufactured viaa die casting process and is designed to overcome the above issues. Inparticular, driver 1200 includes an opening for a motor output shaftthat is configured to have better alignment with the motor output shaftand form a relatively tight fit with the motor output shaft and, thus,results in reduced vibrations (and potential noise) between driver 1200and the motor output shaft. Driver 1200 may be used as an alternative todriver 200 or the example manufacturing process described below may besimilarly performed on driver 200 (or any other drivers disclosedherein) to address the above challenges. Driver 1200 is similar todriver 200 and includes a mounting shaft 1202, a plate 1204, and a setof posts 1206 extending from plate 1204. Mounting shaft 1202 includes anopening 1208 (sometimes referred to as an output shaft opening) toreceive a motor output shaft, such as motor output shaft 108 (FIG. 1).Opening 1208 extends along a rotational axis 1210 (e.g., a central orlongitudinal axis) of driver 1200. In the illustrated example, mountingshaft 1202 is formed with a transverse opening 1212 that extends throughmounting shaft 1202 in a direction that is perpendicular to opening 1208(e.g., transverse opening 1212 extends along an axis that isperpendicular to rotational axis 1210). Transverse opening 1212 enablesmultiple pins to be used during the die casting process to form a moredesirably shaped opening, as discussed in further detail below inconjunction with FIG. 14. In the illustrated example, opening 1208 has ashape that is rectangular with curved sides. The shape of opening 1208is configured to substantially match the shape of the correspondingmotor output shaft. In other examples, the shape of opening 1208 may bedifferent (e.g., a star, a triangle, etc.).

FIG. 13 is a cross-sectional view of driver 1200 taken along line A-A ofFIG. 12. As shown in the illustrated example, transverse opening 1212extends through mounting shaft 1202 and intersects opening 1208. In theillustrated example, opening 1208 is divided into a first channel 1300on one side of transverse opening 1212 (the left side in FIG. 13) and asecond channel 1302 on the other side of transverse opening 1212 (theright side in FIG. 13). First and second channels 1300, 1302 areslightly tapered inward (as discussed in further detail in conjunctionwith FIG. 14). The smallest diameter portion of first channel 1300 formsa first contact location 1304 and the smallest diameter portion ofsecond channel 1302 forms a second contact location 1306. First andsecond contact locations 1304, 1306 are configured to engage a motoroutput shaft (as discussed in further detail in conjunction with FIG.15).

FIG. 14 shows an example configuration of the pins that may be usedduring the die casting process to form opening 1208 and transverseopening 1212 in driver 1200. As illustrated, when forming driver 1200, afirst pin 1400 extends into mounting shaft 1202 from one side (the leftside in FIG. 14) and a second pin 1402 extends into mounting shaft 1202from the opposite side (the right side in FIG. 14), which form first andsecond channels 1300, 1302 (FIG. 13). Additionally, a third pin 1404extends into mounting shaft 1202 in a transverse direction (from the topside in FIG. 14) and a fourth pin 1406 extends into mounting shaft 1202from an opposite transverse direction (from the bottom side in FIG. 14),which form transverse opening 1212. As mentioned above, pins 1400-1406are tapered (at a draft angle) to enable removal of pins 1400-1406 afterthe driver mold hardens. As such, the resulting openings or channels inmounting shaft 1202 are tapered or angled. Pins 1400-1406 may have anyshaped cross-section (e.g., a conical cross-section, a square shapedcross-section, etc.) to produce an opening that matches thecorresponding motor output shaft.

FIG. 15 illustrates motor output shaft 108 inserted into opening 1208 ofmounting shaft 1202. First and second contact locations 1304, 1306 arethe smallest diameter portions of opening 1208 formed by first andsecond pins 1400, 1402 (FIG. 14) during the die casting process. Thesecontact locations 1304, 1306 are spaced apart from each other (onopposite sides of transverse opening 1212). In other words, use of pins1404, 1406 creates the two spaced apart contact locations 1304, 1306.The contact locations 1304, 1306 are configured to engage motor outputshaft 108 at two spaced apart locations (e.g., near two opposite ends ofmotor output shaft 108). As a result, driver 1200 remains substantiallyaligned with and secured on motor output shaft 108, as compared to adriver with a single tapered opening having only one contact point,which results in reduced vibrations and, thus, less potential noise fromvibrations. As disclosed above, in some aspects of this disclosure,mounting shaft 1202 may be coupled to motor output shaft 108 via aninterference fit. Further, using the four pin configuration results in alonger opening (with spaced apart contact points) that enables motoroutput shaft 108 to penetrate deeper into driver 1200, thereby providingbetter contact and alignment to reduce potential vibrations betweendriver 1200 and motor output shaft 108. Thus, this configuration resultsin better tolerances, less rattling and/or vibrations and, thus, lesspotential noise from vibrations. Also, with the four pin configuration,first and second pins 1400, 1402 can have relatively larger draftangles, which is not as readily achievable with a single pin. In someinstance, having larger draft angles facilitates removal of the pins.Further, in some instance, transverse opening 1212 may be used whenassembly driver 1200 on a motor output shaft to verify and ensure themotor output shaft is inserted properly into opening 1208. For example,a manufacturing personnel may look into transverse opening 1212 whensliding driver 1200 onto a motor output shaft to ensure the motor outputshaft is inserted properly into opening 1208. Further, with the four pinconfiguration, the dimension(s) (e.g., lengths and widths) of pins1400-1406 can be changed to create longer or shorter openings foraccommodating different length motor output shafts.

In other aspects of this disclose, a driver, such as driver 200 (FIG. 2)or driver 1200 (FIG. 12) may be die cast using a pin that extends allthe way through the drive to create an opening for the motor outputshaft. In some such examples, a pin with a relatively small draft angle(if any) may be used to produce a relative straight opening. In stillother aspects of this disclosure, a driver, such as driver 200 (FIG. 2)or driver 1200 (FIG. 12), may be die cast without an opening for themotor output shaft. Instead, the mounting shaft may be molded as asubstantially solid part or component. Then, a secondary process, suchas drilling and broaching, may be used to form the opening through themounting shaft. In such an example, a substantially straight opening maybe formed in the mounting shaft that can maintain sufficient contactwith the motor output shaft to remain aligned and secured to motoroutput shaft.

As disclosed above, in other aspects of this disclosure, example drivecouplings may be used between motors and rotating members having otherconfigurations where the motor is not concentric with the rotatingmember, such as a motor and a lift rod that are configured or arrangedin line or end-to-end. For example, an example drive coupling may beused to couple an output shaft of a motor to a rotating member, such asa lift rod, that is axially aligned (or substantially axially aligned)with the output shaft of the motor. The example drive coupling may beused reduce potentially noise that would otherwise be generated by theconnection between the motor and the rotating member.

For example, FIG. 16 illustrates another example of an architecturalcovering 1600 having a covering 1602. Similar to architectural covering100 disclosed above, architectural covering 1600 may be used to cover anarchitectural structure, such as a wall, and/or an architecturalopening, such as a window, a door, a sky light, an archway, etc. In theillustrated example of FIG. 16, architectural covering 1600 includes amotor 1604 and a rotating member, implemented as a lift rod 1606. Inother examples, other types of rotating members may be implemented. Forthe sake of convenience, the example of the architectural covering 1600is described in connection with lift rod 1606. However, it is understoodthat lift rod 1606 is non-limiting, and other types of rotating membersmay be used in addition to or as an alternative to lift rod 1606. Liftrod 1606 may be rotated to wind or unwind one or more lift cords 1608 toextend or retract covering 1602. In particular, each lift cord 1608 iscoupled to a respective spool 1610 (e.g., a reel). When lift rod 1606 isrotated in one direction, lift cords 1608 are wrapped around spools1610, which causes cover 1602 to retract (e.g., raise or otherwiseuncover an architectural structure and/or opening), and when lift rod1606 is rotated in the opposite direction, lift cords 1608 are unwoundfrom spools 1610, which causes cover 1602 to extend (e.g., lower orotherwise cover the architectural structure and/or opening). Motor 1604operates to rotate lift rod 1606 in one direction or the other directiondepending on the desired operation. Motor 1604 has a motor output shaft1612. Similar to motor 104 of FIG. 1, motor 1604 may be powered by anycombination of internal and/or external power line connections, powerfrom a wall outlet, battery(ies), fuel cells, solar panels, wind poweredgenerators, and/or any other power source.

In accordance with one aspect of this disclosure, an example drivecoupling 1614 is used to transfer rotational motion from motor outputshaft 1612 to a rotating member, such as lift rod 1606. Drive coupling1614 greatly reduces noise that would otherwise be generated by theconnection between motor 1604 and lift rod 1606. In particular, drivecoupling 1614 is coupled to and rotates with motor output shaft 1612.Additionally, drive coupling 1614 is coupled to lift rod 1606. As such,when motor 1604 rotates motor output shaft 1612, drive coupling 1614transfers the rotational motion to lift rod 1606. As illustrated in FIG.16, lift rod 1606 is substantially axially aligned with motor outputshaft 1612 and, thus, drive coupling 1614 transfers rotational motionfrom motor output shaft 1612, upstream of drive coupling 1614, to liftrod 1606, downstream of drive coupling 1614.

In accordance with one aspect of this disclosure, the drive couplingincludes one or more vibration-absorbers that are used to reducevibration between the parts of the architectural covering. For example,the drive coupling may include a driver, referred to as a first driver,that connects to the output shaft of the motor and a driven member,referred to a second driver, that connects to the lift rod. The firstdriver rotates the second driver to rotate the lift rod. In accordancewith one aspect of this disclosure, vibration-absorbers are utilizedbetween the first driver and the second driver to reduce vibration and,thus, reduce potential noise in the architectural covering. For example,the first driver may include a first set of mounting structures, such asposts, extending outwardly from a plate in a direction that is parallelto and offset from a rotational axis of the first driver, and the seconddriver may include a second set of mounting structures, such as posts,extending outwardly from another plate in a direction that is parallelto and offset from a rotational axis of the second driver. In accordancewith some aspects of the disclosure, the first and second drivers arepositioned such that the first set of posts extend toward the seconddriver and the second set of posts extend toward the first driver. Totransfer rotational motion from the first set of posts to the second setof posts, the drive coupling includes an intermediate structure, such asa hub, coupled with a plurality of vibration-absorbers. In accordancewith one aspect of the disclosure, the hub is disposed between the firstset of posts and the second set of posts. As the first driver rotates,the first set of posts rotate the hub via the vibration-absorbers and,thus, rotate the second set of posts with the vibration-absorbers and,thus, rotate the second driver. In accordance with one aspect of thedisclosure, the vibration-absorbers are located between the posts andthe hub. As such, the second driver is operatively engaged with thevibration-absorbers on the posts of the first driver (e.g., via thevibration-absorbers on the posts of the second driver and the hub). Inaccordance with some aspects of the disclosure, the second driver may bepositioned such that the second set of posts extend in the samedirection as the first set of posts of the first driver. In such anexample, the second driver may include a central mounting shaft thatextends through a central opening the hub and couples to the lift rod.In accordance with one aspect of the disclosure, the vibration-absorbersmay be embodied as elastic rings. For example, an elastic ring may bedisposed on each post, and the hub is engaged by the elastic rings.Thus, the second driver is indirectly coupled to the first driver by theelastic rings (and the hub). In one aspect of the disclosure, theelastic rings are implemented as grommets. The interface between thefirst driver, the vibration-absorbers, the hub, and the second driverresults in decreased vibration, which greatly reduces and/or eliminatesnoise that would otherwise be generated by a traditional connection.

For example, FIG. 17 is an exploded view of an example of an embodimentof a drive coupling. In the illustrated example, drive coupling 1614includes a driver 1700, referred to as first driver 1700, a set ofelastic rings 1702, a hub 1704, and a second driver 1706 (e.g., a drivenmember, a lift cord interface). First driver 1700 includes a mountingshaft 1708 that is configured to be coupled to motor output shaft 1712of motor 1604 (FIG. 16). In one aspect of this disclosure, mountingshaft 1708 includes an opening 1710 to receive motor output shaft 1612.In one aspect of the disclosure, first driver 1700 is coupled to motoroutput shaft 1712 via an interference fit. In another aspect of thedisclosure, first driver 1700 is coupled to motor output shaft 1612 viaa set screw (a screw extending through mounting shaft 1708 into motoroutput shaft 1612). Additionally or alternatively, in another aspect ofthe disclosure, other chemical and/or mechanical fasteners may be usedto couple first driver 1700 and motor output shaft 1612. When coupled tomotor output shaft 1612, motor 1604 rotates first driver 1700 about afirst rotational axis 1712 (e.g., a central or longitudinal axis offirst driver 1700). In one aspect of this disclosure, first rotationalaxis 1712 is substantially aligned with the rotational axis of motoroutput shaft 1612 of motor 1604.

In the illustrated example of FIG. 17, first driver 1700 includes aplate 1714 coupled to mounting shaft 1708. Plate 1714 is orientedperpendicular to first rotational axis 1712. First driver 1700 includesa set of posts 1716 that are coupled to and extend from a face 1718 ofplate 1714. In other aspects of this disclosure, first driver 1700 mayinclude more (e.g., three, four, etc.) or fewer (e.g., one) posts. Posts1716 are parallel to and offset from first rotational axis 1712. Eachpost 1716 may include a ball or nub 1720 at the distal end of therespective post 1716 to restrict the respective elastic rings 1702 fromsliding off, as disclosed in further detail herein. In one aspect ofthis disclosure, first driver 1700 is constructed as a substantiallyunitary part or component. For example, first driver 1700 may be moldedas a single part or component and/or machined from a single piece ofmaterial. In another aspect of this disclosure, first driver 1700 may beconstructed of multiple parts or components that are coupled together(e.g., posts 1716 may be welded to plate 1714, plate 1714 may be weldedto mounting shaft 1708, etc.).

In the illustrated example, second driver 1706 includes a mounting shaft1722 that is configured to be coupled to an end of a rotating membersuch as lift rod 1606 (FIG. 16). In one aspect of this disclosure,second driver 1706 includes an opening to receive lift rod 1606, asdisclosed in further detail in connection with FIG. 20. Similar to firstdriver 1700, second driver 1706 includes a plate 1724 and a second setof posts 1726 with nubs 1728 extending from a face 1730 of plate 1724.Second driver 1706 is rotatable about a second rotational axis 1731,which is substantially aligned with the rotational axis of lift rod1606. In one aspect of the disclosure, second rotational axis 1731 issubstantially aligned with first rotational axis 1712. In other aspectsof this disclosure, as discussed in further detail in connection withFIGS. 21A and 21B, second rotational axis 1731 may not be aligned withfirst rotational axis 1712.

To transfer rotational motion between first driver 1700 and seconddriver 1706, hub 1704 is disposed between first driver 1700 and seconddriver 1706. In the illustrated example, hub 1704 is a plate having fournotches 1732 in an outer edge 1734 of hub 1704. When drive coupling 1614is assembled, hub 1704 is disposed between posts 1716 of first driver1700 and posts 1726 of second driver 1706. Therefore, first driver 1700rotates hub 1704, which rotates second driver 1706 to transferrotational motion to lift rod 1606 (FIG. 16).

Similar to drive coupling 110 disclosed in connection with FIGS. 1-8,one or more parts for absorbing vibration are included in drive coupling1614 to dampen potential vibration and, thus, reduce potential noise.The vibration-absorber(s) may be constructed of a lower durometermaterial (e.g., Shore A material such as nitrile rubber). Thevibration-absorber(s) may be interposed in one or more locations betweenthe relatively harder part(s) of drive coupling 1614. For example,referring to FIG. 17, drive coupling 1614 includes elastic rings 1702.In the illustrated example, elastic rings 1702 are implemented asgrommets. Each elastic ring 1702 includes an opening 1736 (one of whichis reference in FIG. 17) and a groove 1738 (one of which is referencedin FIG. 17) formed around an outer edge of the respective elastic ring1702. Elastic rings 1702 may be substantially the same as elastic rings202 disclosed in detail above in connection with FIG. 2. Thus, to avoidredundancy, a description of the type of materials, the function, andthe sizes of the elastic rings 1702 is not repeated here. Instead, theinterested reader is referred back to the discussion of FIGS. 2-8 for afull written description of the elastic rings.

As illustrated in FIG. 18, elastic rings 1702 are configured to beinserted into notches 1732 (FIG. 17) of hub 174. As such, outer edge1734 of hub 1704 extends into grooves 1738 (one of which is referencedin FIG. 18) of each elastic ring 1702. Further, generally one elasticring 1702 is to be coupled to each of posts 1716 of first driver 1700and posts 1726 of second driver 1706. In particular, posts 1716, 1726are to be inserted into openings 1736 (one of which is referenced inFIG. 18) of the respective elastic rings 1702. Thus, second driver 1706is operatively engaged with the elastic rings 1702 on posts 1716 of thefirst driver 1700 (via elastic rings 1702 on posts 1726 of second driver1706 and hub 1704). Nubs 1720, 1728 have a larger diameter than openings1736 of elastic rings 1702. As a result, once elastic rings 1702 are onposts 1716, 1726, nubs 1720, 1728 help to maintain elastic rings 1702 onposts 1716, 1726, unless a sufficient force is applied in the axialdirection to pull the corresponding nub 1720, 1728 through opening 1736of the corresponding elastic ring 1702. An example process of assemblingdrive coupling 1714 may include inserting posts 1716, 1726 into elasticrings 1702 (i.e., placing elastic rings 1702 on posts 1716, 1726), andthen placing hub 1704 between posts 1716, 1726 such that elastic rings1702 are inserted into notches 1732 of hub 1704. Another exampleassembly process may include inserting elastic rings 1702 into notches1732 of hub 1704 first (as shown in FIG. 18), and then inserting posts1716, 1726 into elastic rings 1702.

In accordance with one aspect of this disclosure, the clearance betweenthe inner diameter of openings 1736 and a diameter of respective posts1716, 1726 may be about 0.005 in (0.127 mm) (e.g., ±0.003 in (0.076mm)), similar to the clearance disclosed above in connection withelastic rings 202 and posts 214 of FIG. 2. For example, the innerdiameter may be about 0.125 in (3.175 mm) and the diameter of posts1716, 1726 may be about 0.119 in (3.023 mm)±0.003 in (0.076 mm). In someinstances, this clearance results in the most noise reduction whilestill enabling easy assembly of elastic rings 1702 on posts 1716, 1726.In other aspects of this disclosure, the inner diameter of elastic rings1702 and/or the diameter of the respective posts 1716, 1726 may belarger or smaller. In one aspect of this disclosure, the clearance ordifference between the width of groove 1738 and a width of hub 1704 isabout 0.005 in (0.127 mm) (e.g., ±0.003 in (0.076 mm)). For example, thewidth of groove 1738 may be about 0.0625 in (1.5875 mm) and the width ofhub 1704 may be about 0.087 in (2.21 mm) (e.g., ±0.003 in (0.076 mm)).In some instances, this clearance results in minimal noise caused fromvibration between the parts and components of the architectural covering1600. In other aspects of this disclosure, the dimensions of the widthof groove 1738 and/or the width of hub 1704 may be larger or smaller.

In the illustrated example, first driver 1700 includes two posts 1716and second driver 1706 includes two posts 1726. In other aspects of thisdisclosure, first driver 1700 and/or second driver 1706 may include moreor fewer posts. For example, first driver 1700 and second driver 1706may each include three posts. In such an example, hub 1704 may includesix notches, and elastic rings may be disposed on each of the postsbetween the respective post and hub 1704.

Assembled views of drive coupling 1614 are illustrated in FIGS. 19 and20. In the assembled state, posts 1716 of first driver 1700 extendoutwardly beyond hub 1704 toward second driver 1706, and posts 1726 ofsecond driver 1706 extend outwardly beyond hub 1704 toward first driver1700 (e.g., in the opposite direction). As a result, hub 1704 isdisposed between posts 1716, 1726 and, thus, between first driver 1700and second driver 1706. In the assembled state, elastic rings 1702 aredisposed along a common plane. In some aspects of this disclosure, nubs1720, 1728 on posts 1716, 1726 prevent elastic rings 1702 and, thus, hub1704 from being removed from posts 1716, 1726 (unless a sufficient forceis applied in either direction to pull the corresponding nub 1720, 1728through opening 1736 of the corresponding elastic ring 1702). In otheraspects of this disclosure, no nubs may be used.

As illustrated in FIGS. 19 and 20, elastic rings 1702 are interposedbetween first driver 1700 and hub 1704, and between hub 1704 and seconddriver 1706, which reduces or eliminates contact between first driver1700, hub 1704, and second driver 1706. Elastic rings 1702 absorbvibration that may otherwise cause acoustic waves (e.g., sound) betweenfirst driver 1700 (e.g., the driving member) and second driver 1706(e.g., the driven member). In the illustrated example of FIG. 20,mounting shaft 1722 of second driver 1706 includes an opening 2000 toreceive lift rod 1606 (FIG. 16). In one aspect of the disclosure, seconddriver 1706 is coupled to lift rod 1606 via interference fit.Additionally or alternatively, in another aspect of the disclosure,other chemical and/or mechanical fasteners may be used to couple seconddriver 1706 and lift rod 1606.

In some aspects of this disclosure, the drive coupling may be used toenable transfer of rotational motion even if the output shaft of themotor and rotating member (e.g., a lift rod) are misaligned. Forexample, as illustrated in FIG. 21A, if second driver 1706 is angledwith respect to hub 1704 and and/or to first driver 1700, desiredoperation and transference of rotation are not impeded with the desirednoise reduction of other embodiments disclosed herein. In theillustrated example of FIG. 21A, second driver 1706 has been rotated ortilted about an axis extending into the figure through posts 1726. Inparticular, second driver 1706 is angled with respect to hub 1704 (atangle α) angled with respect to first driver 1700 (at angle θ). Elasticrings 1702 (one of which is referenced in FIG. 21) compress or deform toenable posts 1726 of second driver 1706 to tilt with respective toopenings 1736 (FIG. 17) of elastic rings 1702 and, thus, with respect tohub 1704 and/or first driver 1700. As such, second rotational axis 1731of second driver 1706 (and, thus, lift rod 1606 (FIG. 16)) is notaligned with rotational axis 1712 of first driver 1700, but the desiredtransference of rotational motion is still achieved.

While second driver 1706 is illustrated as tilted about an axis (e.g., afirst degree of freedom) extending into the figure through posts 1726 inFIG. 21, second driver 1706 may additionally or alternatively be tiltedabout another axis (e.g., a second degree of freedom) as illustrated inFIG. 21. FIG. 21 illustrates drive coupling 1614 rotated 90° about firstrotational axis 1712, as compared to FIG. 21, and without second driver1706 being tilted about the axis in FIG. 21. In FIG. 21, second driver1706 is angled with respect to first driver 1700 about an axis thatextends into the figure through posts 1716 and is perpendicular to theaxis about which second driver 1706 is tilted in FIG. 21A. In theillustrated example of FIG. 21B, hub 1704 is angled with respect tofirst driver 1700 (at angle β), and second driver 1706 is angled withrespect to first driver 1700 (at angle φ). Elastic rings 1702 (one ofwhich is referenced in FIG. 21B) compress or deform to enable posts 1716of first driver 1700 to tilt with respective to openings 1736 (FIG. 17)of elastic rings 1702. Therefore, second rotational axis 1731 of seconddriver 1706 (and, thus, the rotating member (such as lift rod 1606 (FIG.16))) is not aligned with first rotational axis 1712 of first driver1700. Thus, second driver 1706 may be rotated or tilted about one orboth of these axes (or vice versa). In other words, first and seconddrivers 1700, 1706 are movable about two degrees of freedom relative toeach other, which enables first rotational axis 1712 and secondrotational axis 1731 to remain in relatively fixed directions whilefirst and second drivers 1700, 1706 rotate. As such, drive coupling 1614enables motor output shaft 1612 (FIG. 16) to transfer rotational motionto the rotating member even if motor output shaft 1612 and the rotatingmember are not axially aligned.

Further, in some aspects of the disclosure, the drive coupling may beused to enable transfer of rotational motion if the output shaft of themotor and the rotating member (e.g., a lift rod) are parallel to butoffset from each other. For example, as illustrated in FIG. 22A, seconddriver 1706 has been moved relative to first driver 1700 such thatrotational axis 1712 of first driver 1700 and rotational axis 1731 ofsecond driver 1706 are parallel to but offset from each other. In otherwords, first driver 1700 and/or second driver 1706 can be shifted out ofaxial alignment (e.g., sideways) and still transfer rotational motion,which enables motor output shaft 1612 (FIG. 16) to transfer rotationalmotion to the rotating member even if motor output shaft 1612 and therotating member are not axially aligned. In FIG. 22A, hub 1704 has beenremoved for clarity. FIG. 22B shows a plan view of the hub 1704. Asillustrated, posts 1716, 1726 (represented by crosses) of first andsecond drivers 1700, 1706 (FIG. 22A) and the associated elastic rings(shown in dashed lines) can move within the respective notches 1732 inhub 1704, thereby enabling hub 1704 to shift (up, down, left, or rightin FIG. 22B). For example, if first driver 1700 is moved upward in FIG.22B, posts 1716 of first driver 1700 move hub 1704 upward, which causesposts 1726 of second driver 1706 to shift in the respective notches1732. Likewise, if second driver 1706 is moved left in FIG. 22B, forexample, posts 1726 of second driver 1706 move hub 1704 left, whichcauses posts 1716 of first driver 1700 to shift in the respectivenotches. Thus, the rotational axes of first and second driver 1700, 1706(and, thus, motor output shaft 1612 and the rotating member) may beoffset from each other. In some aspects of this disclosure, posts 1716,1726 (and, thus, the associated elastic rings) can shift about 0.020inches in the respective notches 1732. In others aspects of thisdisclosure, posts 1716, 1726 can shift more or less. For example,notches 1732 may be slotted longer or shorter to enable differentamounts of travel.

While in drive coupling 1614 of FIGS. 16-22B first driver 1700 andsecond driver 1706 are on opposite sides of hub 1704 (e.g., in anopposing arrangement), in other aspects of this disclosure, a drivecoupling may include two drivers that are disposed on the same side of ahub. For example, FIGS. 23A and 23B illustrate another example drivecoupling 2300 that may be used with an architectural covering, such asarchitectural covering 1600 (FIG. 16), to transfer rotational motionfrom a motor output shaft, such as motor output shaft 1612 (FIG. 16), toa rotating member, such as lift rod 1606 (FIG. 16). In some examples,the arrangement of parts of drive coupling 2300 results in a shorterassembly time. Further, as shown in the side view of FIG. 23B, drivecoupling 2300 has a shorter length (between an end of mounting shaft2310 and an end of central mounting shaft 2320) and, thus, is morecompact and can be used in smaller spaces (e.g., in a smaller gapbetween a motor output shaft and a lift rod).

FIG. 23A illustrates an exploded view of drive coupling 2300 and FIG.23B illustrates an assembled side view of drive coupling 2300. Drivecoupling 2300 includes a driver 2302, referred to as first driver 2302,a set of elastic rings 2304, a hub 2306, and a second driver 2308 (e.g.,a driven member, a lift cord interface). First driver 2302 includes amounting shaft 2310, a plate 2312, and a first set of posts 2314extending from plate 2312. First driver 2302, elastic rings 2304, andhub 2306 are substantially the same as first driver 1700, elastic rings1702, and hub 1704 of drive coupling 1614 shown in FIGS. 16-22B. Thus,to avoid redundancy, a description of these structures and theassociated functions are not repeated herein. Instead, the interestedreader is referred back to the discussion of FIGS. 16-22B for a fullwritten description of these structures and functions.

As illustrated in FIGS. 23A and 23B, second driver 2308 includes a plate2316 and a second set of posts 2318 extending from plate 2316. In theillustrated example, second driver 2308 is positioned such that posts2318 extend in a same direction as posts 2314 of first driver 2302. Whenassembled, as shown in FIG. 23B, plate 2316 of second driver 2308 isdisposed between plate 2312 of first driver 2302 and hub 2306. Posts2314, 2318 extend through respective ones of elastic rings 2304, whichengage hub 2306, similar to drive coupling 1614 disclosed above, todampen vibration and, thus, reduce potential noise. As shown in FIGS.23A and 23B, second driver 2308 also includes a central mounting shaft2320 that extends from plate 2316 of second driver 2308 in the samedirection as posts 2318. When drive coupling 2300 is assembled, centralmounting shaft 2320 extends through a central opening 2322 (FIG. 23A) inhub 2306. As shown in FIG. 23A, central mounting shaft 2320 includes anopening 2324 to receive a lift rod, similar to opening 2000 of seconddriver 1706 shown in FIG. 20. Thus, the arrangement of first driver2302, vibration absorbers 2304, hub 2308, and second driver 2308 enablesa lift rod to be rotated with a motor output shaft. In the illustratedexample of FIG. 23A, opening 2324 is V-shaped to receive a correspondingV-shaped end on a lift rod. In other examples, opening 2324 may beshaped differently. In some aspects of this disclosure, central opening2322 is larger than the diameter of central mounting shaft 2320 toenable central mounting shaft 2320 (and, thus, second driver 2308) tomove laterally. As disclosed in connection with FIGS. 21A-21B, theinteraction between the posts, the elastic rings, and the hub enablefirst and second drivers 2302, 2308 to transfer rotational motion evenwhen misaligned. In some aspects of this disclosure, the arrangement ofparts of drive coupling 2300 results in a shorter assembly time.Further, as shown in the side view of FIG. 23B, drive coupling 2300 hasa shorter length (between an end of mounting shaft 2310 and an end ofcentral mounting shaft 2320) and, thus, is more compact and can be usedin smaller spaces (e.g., in a smaller gap between a motor output shaftand a lift rod). When an architectural covering, such as architecturalcovering 100 (FIG. 1) or architectural covering 1600 (FIG. 12), ismounted to an architectural opening (e.g., a window) and/or anarchitectural structure (e.g., a wall), a valance is often coupled tothe outside of the architectural covering and/or to the architecturalopening/structure to cover or hide the architectural covering. In someinstances, the valance is coupled to the frame or structure to which thearchitectural covering is mounted. In other instances, the valance iscoupled to or constructed as part of a headrail, which includes abracket or mounting plate to which the architectural covering iscoupled. Disclosed herein are examples of valances having a layer ofsound-dampening material that help to attenuate or dampen potentialnoise from movement of the architectural covering. In one aspect of thisdisclosure, a layer of sound-dampening material is coupled to a backside of the valance, which is the side facing the architecturalcovering. As such, potential noise (e.g., acoustic waves) generated bythe architectural covering is absorbed by the sound-dampening materialand prevented from passing through the valance and into the surroundingenvironment. Also disclosed herein are example of methods forconstructing valances and/or headrails with sound-dampening materials.In one aspect of this disclosure, a layer of sound-dampening materialhas an adhesive side, which is engaged with the back side of thevalance. Additionally or alternatively, a clip may be provided to couplethe layer of sound-dampening material to the back side of the valance.The clip and the layer of sound-dampening material may be constructed bya simultaneous extrusion process, which results in the layer ofsound-dampening material being connected or fused to the clip.

For example, FIG. 24 illustrates architectural covering 100 (shown indashed lines) disposed at a top of a window opening 2400. Window opening2400 is defined by a frame 2402. In the illustrated example,architectural covering 100 is carried by a headrail 2404 (e.g., abracket), which is coupled to frame 2402. Headrail 2404 may be coupledto frame 2402 via one or more mechanical fasteners, such as screw(s)and/or nail(s). In the illustrated example of FIG. 24, the headrail 2404includes a top mounting plate 2406 and a valance 2408. Valance 2408extends or projects downward from top mounting plate 2406 and, thus,covers and/or otherwise obstructs the view of architectural covering100. Valance 2408 has a front side 2410, which faces outward (e.g.,toward a user), and a back side 2412, which faces toward architecturalcovering 100.

In accordance with one aspect of this disclosure, a retainer, such as aclip, may be used to couple a layer of sound-dampening material to aback side of the valance. In one aspect of this disclosure, the layer ofsound-dampening material is coupled to the clip (e.g., via an adhesive,via fusion from an extrusion process, etc.). The clip may be connectedto the back side of the valance such that the layer of sound-dampeningmaterial is sandwiched between the clip and the back side of thevalance. For example, the clip may have a first connector (e.g., a maleconnector) and the back side of the valance may have a second connector(e.g., a female connector) that mates with the first connector, and theclip may be connected to the back side of the valance by coupling thefirst and second connectors. In accordance with one aspect of thisdisclosure, the clip may block or prevent the covering from contactingthe sound-dampening material as the covering is raised or lowered. Insome instances, the coloring of the sound-dampening material may rub offonto the covering if the covering comes into contact with thesound-dampening material. As such, the clip protects the covering fromcontacting the sound-dampening material, while still enabling thevalance and architectural covering to be disposed relatively close(e.g., in a compact assembly).

For example, FIG. 25A illustrates an example of a clip 2500 that may beused to couple a layer of sound-dampening material 2502 to back side2412 of valance 2408. In the illustrated example, valance 2408 includesa female connector 2504 (e.g., a first connector) extending along backside 2412 of valance 2408. Female connector 2504 includes a slot 2506.Clip 2500 has a front side 2508 and a back side 2510. In the illustratedexample of FIG. 25A, sound-dampening material 2502 is disposed on backside 2510 of clip 2500. In one aspect of this disclosure,sound-dampening material 2502 is coupled to back side 2510 of clip 2500via an adhesive. In the illustrated example, clip 2500 includes a maleconnector 2512 (e.g., a second connector) extending along back side 2510of clip 2500. As illustrated in FIG. 25B, male connector 2512 may beinserted into female connector 2504 to couple clip 2500 to back side2412 of valance 2408. In one aspect of the disclosure, male connector2512 is compressible and may be press fit into female connector 2504.For example, male connector 2512 may be squeezed or compressed, insertedinto slot 2506 of female connector 2504, and then released. Oncereleased, male connector 2512 expands inside slot 2506. Additionally oralternatively, male connector 2512 may be slid into female connector2504 from an end of female connector 2504. When clip 2500 is coupled tovalance 2408, a wedge-shaped cavity is formed, and sound-dampeningmaterial 2502 is disposed in the cavity.

In the arrangement illustrated in FIG. 25B, sound-dampening material2502 is disposed between clip 2500 and valance 2408. Sound-dampeningmaterial 2502 attenuates the potential noise caused by movement ofarchitectural covering 100 (FIG. 24). Architectural covering 100 may becoupled to a mounting bracket 2514 on headrail 2404, for example, shownin FIGS. 25A and 25B. In one aspect of the disclosure, sound-dampeningmaterial 2502 is a synthetic rubber such as butyl rubber (which is acopolymer of isobutylene and isoprene). Additionally or alternatively,sound-dampening material 2502 may include other types of sound-dampeningmaterials such as, for example, styrene-butadiene rubber, acrylicrubber, natural rubber, elastomers, plastics, etc. In one aspect of thedisclosure, clip 2500 is constructed of a thermoplastic resin, such asAcrylonitrile Butadiene Styrene (ABS), or vinyl. In other aspects of thedisclosure, clip 2500 may be constructed of other materials. While inthe illustrated example of FIGS. 25A and 25B only one layer ofsound-dampening material is implemented, in other aspects of thedisclosure, more than one layer of sound-dampening material may beimplemented. For example, a second layer of sound-dampening material maybe stacked on sound-dampening material 2502. The second layer ofsound-dampening material may be the same as or different than thesound-dampening material 2502.

An example method of manufacturing headrail 2404 may include extrudingclip 2500 using a first extrusion die and extruding sound-dampeningmaterial 2502 using a second extrusion die. In an extrusion process, amaterial (e.g., starting with pellets) is heated and pushed through adie having a desired cross-section of the part or component, whichcreates an elongated part having a relatively constant cross-section.For example, clip 2500 may be constructed by extruding a first materialthrough the first extrusion die (having the cross-section of the shapeof clip 2500) and sound-dampening material 2502 may be constructed byextruding a sound-dampening material through the second extrusion die(having a rectangular cross section) to form an co-extrudedclip/sound-dampening component. The dies may be nozzle or slot-dies, forexample. In one aspect of the disclosure, clip 2500 and sound-dampeningmaterial 2502 are extruded simultaneously and coupled to each other viathe co-extrusion process (e.g., fused together). In other words, theextrusion process may be configured such that the materials exiting therespective dies are engaged. When the materials cool and harden, thematerials are fused together. Then, clip 2500 may be coupled to valance2408, as illustrated in FIG. 25B. In some aspects of this disclosure,co-extruding clip 2500 and sound-dampening material 2502 in such amanner results in a relatively simple process to form the combinedclip/sound-dampening material, a relatively strong coupling between clip2500 and sound-dampening material 2502, and/or easy ability to modifythe dies and make customized shapes.

In one aspect of the disclosure, sound-dampening material 2502 has asubstantially rectangular cross-section. When clip 2500 is coupled toback side 2412 of valance 2408, a wedge-shaped cavity is formed, whichis substantially filled by sound-dampening material 2502. However, inother aspects of the disclosure, sound-dampening material 2502 may beextruded as another shape (e.g., a wedge).

In another aspect of the disclosure, an adhesive layer may be extrudedbetween clip 2500 and sound-dampening material 2502, which couplessound-dampening material 2502 to clip 2500. In another aspect of thisdisclosure, clip 2500 and sound-dampening material 2502 may be extrudedseparately, and then sound-dampening material 2502 may be coupled toback side 2510 of clip 2500. Valance 2408 and/or headrail 2404 may alsobe formed by an extrusion process. In one aspect of the disclosure,valance 2408 and/or headrail 2404 may be constructed of aluminum. Inother aspect of the disclosure, valance 2408 and/or headrail 2404 may beconstructed of other materials.

In other aspects of this disclosure, a layer of sound-dampening materialmay be coupled to a back side of a valance in other manners. Forexample, as illustrated in FIG. 26A, a layer of sound-dampening material2600 may have an adhesive side 2602. A backing strip or liner 2604 maybe removed from adhesive side 2602, as illustrated in FIG. 26A, andsound-dampening material 2600 may be coupled to a back side 2606 of avalance 2608, as illustrated in FIG. 26B. In the illustrated example ofFIG. 26B, a bottom edge 2610 of sound-dampening material 2600 issubstantially even or flush with a bottom edge 2612 of valance 2608.However, in other aspects of this disclosure, sound-dampening material2600 may be placed higher on back side 2606 such that bottom edge 2610of sound-dampening material 2600 is spaced apart from bottom edge 2612of valance 2608. Additionally or alternatively, the width/height ofsound-dampening material 2600 may be longer or shorter, depending on thedesired coverage.

In another aspect of the disclosure, a valance may include a pocket orrecess and sound-dampening material may be extruded into the pocket orrecess, which holds the sound-dampening material. For example, asillustrated in FIG. 27, a headrail 2700 includes a valance 2702 having afront side 2704 and a back side 2706. Valance 2702 has a curved lip 2708that forms a pocket 2710 along back side 2706. Sound-dampening material2712 may be inserted into pocket 2710. In one aspect of the disclosure,sound-dampening material 2712 may be ejected into pocket 2710 from aslot die nozzle 2714. Sound-dampening material 2712 may be fed through afeed line 2716 and out of nozzle 2714 into pocket 2710. In one aspect ofthe disclosure, valance 2702 is constructed via an extrusion process,while nozzle 2714 simultaneously extrudes sound-dampening material 2712into pocket 2710. Lip 2708 holds sound-dampening material in place andalso protects the covering (e.g., fabric) from contactingsound-dampening material 2712, which may otherwise leave marks on thecovering. In one aspect of the disclosure, sound-dampening material 2712is butyl rubber.

The aspects of this disclose relating to the drive coupling may be usedseparate from or in combination with the aspects of this disclosurerelating to the sound-dampening material on the valance. For example,while FIG. 24 illustrates example architectural covering 100 (havingdrive coupling 110 (FIG. 2)) used in combination with valance 2408(having sound-dampening material 2502 (FIG. 25A)), example architecturalcovering 1600 (having drive coupling 1614 (FIG. 16) or drive coupling2300 (FIG. 23A)) may instead be used in combination with valance 2408.Further, in other examples, any of these sound-reducing features may beused independently of each other. For example, drive coupling 110 may beused on any type of motorized or non-motorized architectural covering,which may or may not use a valance. Likewise, example valance 2408 maybe used with other motorized or non-motorized architectural coveringsthat do not employ example drive coupling 110, drive coupling 1614, ordrive coupling 2300. However, in some aspects of the disclosure, thecombination of using vibration-absorbers in a drive coupling (e.g.,drive coupling 110) and using a layer of sound-dampening material on avalance (e.g., valance 2408, valance 2608, or valance 2702) decreasesaudible noise by an amount that is greater than or equal to the sum ofthe noise reduction caused by each feature used by itself. Thus, in someinstances, the use of these features together causes a significantreduction in audible noise.

From the foregoing, it will be appreciated that the above discloseddrive couplings and sound-dampening materials may be used to reducepotential sound or noise generated by an architectural covering.Additionally, example drive couplings disclosed herein utilize fewerparts than known coupling assemblies for transferring rotational motionfrom a motor to a roller tube. As such, example drive couplings are lessexpensive to manufacture and assemble than known coupling assemblieswithin architectural coverings.

What is claimed is:
 1. An apparatus to reduce noise in a motor assembly,said apparatus comprising: a first driver configured to be coupled toand rotated by an output shaft of a motor, said first driver including afirst set of posts; a second driver, said second driver including asecond set of posts; a plurality of vibration-absorbers coupled torespective ones of said posts on said first and second drivers, each ofsaid vibration-absorbers having a groove formed in an outer edge of saidrespective vibration-absorbers; and a hub disposed between said firstdriver and said second driver such that an edge of said hub extends intosaid grooves of said vibration-absorbers, wherein said second driver isconfigured to be coupled to a rotating member to transfer rotationalmotion from said first driver to the rotating member via saidvibration-absorbers.
 2. The apparatus of claim 1, wherein saidvibration-absorbers include elastic rings.
 3. The apparatus of claim 1,further including a rotating member in the form of a lift rod of anarchitectural covering, said lift rod rotates one or more spools to windone or more lift cords, wherein said second driver is coupled to an endof said lift rod.
 4. The apparatus of claim 1, wherein said first driverincludes a mounting shaft having an output shaft opening to receive theoutput shaft of the motor, said output shaft opening having two contactlocations configured to engage the output shaft of the motor, said twocontact locations axially separated in said output shaft opening by atransverse opening extending through said mounting shaft in a directionthat is perpendicular to said output shaft opening.
 5. The apparatus ofclaim 1, wherein said first set of posts extend toward said seconddriver, and said second set of posts extend toward said first driver. 6.The apparatus of claim 5, wherein said vibration-absorbers are disposedbetween said first driver and said hub and between said hub and saidsecond driver.
 7. The apparatus of claim 6, wherein said edge of saidhub is an outer peripheral edge of said hub, and wherein said hubincludes a plurality of notches extending into said outer peripheraledge of said hub, said vibration-absorbers disposed in respective onesof said notches.
 8. The apparatus of claim 1, wherein said posts extendthrough openings in respective ones of said vibration-absorbers suchthat distal ends of said posts are disposed beyond said respective onesof said vibration-absorbers.
 9. The apparatus of claim 8, wherein saiddistal ends of said posts have nubs to retain said respective ones ofsaid vibration-absorbers on said posts, said nubs having largerdiameters than said openings in said vibration-absorbers.
 10. Anapparatus to reduce noise while operating an architectural covering,said apparatus comprising: a vibration-absorber having an opening, saidvibration-absorber having a groove formed in an outer edge of saidvibration-absorber; a driver configured to be coupled to and rotated byan output shaft of a motor in the architectural covering, said driverhaving a post extending through said opening such that a distal end ofsaid post is disposed beyond said vibration-absorber, said distal endhaving a nub, said nub having a larger diameter than said opening toretain said vibration-absorber on said post; a driven member; and a hubdisposed between said driver and said driven member such that an edge ofsaid hub extends into said groove of said vibration absorber, saiddriven member operatively engaged with said vibration-absorber via saidhub, said driven member configured to be coupled to a rotating member totransfer rotational motion from said driver to the rotating member viasaid vibration-absorber and said hub.
 11. The apparatus of claim 10,wherein said driver includes a set of posts, and said vibration-absorberincludes a set of vibration-absorbers, each of said vibration-absorberscoupled to a respective one of said posts.
 12. The apparatus of claim11, wherein said vibration-absorbers include elastic rings.
 13. Theapparatus of claim 10, further including: a valance to be disposedoutside the rotating member; and a layer of sound-dampening materialcoupled to the valance.
 14. The apparatus of claim 13, wherein the layerof sound-dampening material includes butyl rubber.
 15. The apparatus ofclaim 10, wherein said vibration-absorber is a first vibration-absorber,said opening is a first opening, and said post is a first post, theapparatus further including a second vibration-absorber having a secondopening, and wherein said driven member has a second post extendingthrough said second opening of said second vibration-absorber, saidsecond vibration-absorber engaged with said hub.
 16. The apparatus ofclaim 15, wherein said first post extends toward said driven member, andsaid second post extends toward said driver.
 17. A method of dampeningvibration imparted from a driver to a driven member in an architecturalcovering, said method comprising: positioning a first set ofvibration-absorbers on a first set of posts of a first driver coupled toand rotated by an output shaft of a motor; positioning a second set ofvibration-absorbers on a second set of posts of a second driver coupledto a driven member of an architectural covering, each of thevibration-absorbers having a groove formed in an outer edge of therespective vibration-absorbers; and positioning a hub between the firstdriver and the second driver such that an edge of the hub extends intothe grooves of the vibration-absorbers, wherein the vibration-absorbersdampen the transmission of vibration between the output shaft and thedriven member.
 18. The method of claim 17, wherein thevibration-absorbers are elastic rings.
 19. The method of claim 17,wherein the vibration-absorbers are constructed of nitrile rubber, themethod including dampening vibrations of the output shaft by absorptionthrough the vibration-absorbers.
 20. The method of claim 17, wherein theedge of the hub is an outer peripheral edge of the hub, wherein the hubhas a plurality of notches extending into the outer peripheral edge ofthe hub, and wherein positioning the hub between first driver and thesecond driver includes positioning the vibration-absorbers in respectiveones of the notches.